US4948260A - Method and apparatus for examining hairiness of yarn - Google Patents

Method and apparatus for examining hairiness of yarn Download PDF

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Publication number
US4948260A
US4948260A US07/320,828 US32082889A US4948260A US 4948260 A US4948260 A US 4948260A US 32082889 A US32082889 A US 32082889A US 4948260 A US4948260 A US 4948260A
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Prior art keywords
light
yarn
detector
path
lens
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Expired - Lifetime
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US07/320,828
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English (en)
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Ernst Felix
Hans Wampfler
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Uster Technologies AG
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Zellweger Uster AG
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Assigned to IKB DEUTSCHE INDUSTRIEBANK AG, MIGROSBANK, SEB AG/SEB MERCHANT BANKING, BNP PARIBAS (SUISSE) SA, THURGAUER KANTONALBANK, UBS AG, CREDIT SUISSE, BANK LINTH, INVESTKREDIT BANK AG, KBC BANK DEUTSCHLAND AG reassignment IKB DEUTSCHE INDUSTRIEBANK AG SECURITY AGREEMENT Assignors: USTER TECHNOLOGIES AG
Assigned to USTER TECHNOLOGIES AG reassignment USTER TECHNOLOGIES AG RELEASE OF SECURITY INTEREST Assignors: BANK LINTH, BNP PARIBAS (SUISSE) SA, CREDIT SUISSE, IKB DEUTSCHE INDUSTRIEBANK AG, INVESTKREDIT BANK AG, KBC BANK DUTSCHLAND AG, MIGROSBANK, SEB AG/SEB MERCHANT BANKING, THURGAUER KANTONALBANK, UBS AG
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
    • G01N21/8915—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined non-woven textile material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/36—Textiles
    • G01N33/365—Filiform textiles, e.g. yarns

Definitions

  • the invention concerns a procedure to determine the surface structure of an extended testpiece, especially to measure yarn hairiness, in which the testpiece is illuminated by a transmitter and the light, which reflects from the surface to be examined and is influenced by the structure of such surface, is fed to a detector and evaluated.
  • the yarn is illuminated with monochromatic laser light, and the light emitted from the thread is fed to the receiver, which is placed in the main path of the rays.
  • the receiver lens In the focal point of the receiver lens, a Fourier-diaphragm is placed, which absorbs the direct light, so that only the light diffracted from the standing fibers reaches the receiver.
  • the measured light intensity is in proportion to the number of fibers standing up on the yarn surface and, therefore, is a measure of its hairiness.
  • the laser which is needed for this procedure, due to the required light intensity, represents a considerable limitation; if a laser diode (or semiconductor laser) is used, it is difficult to handle and can be destroyed by static charges, overvoltages or reversed voltages.
  • standard laser diodes are expensive. Gas lasers are also expensive, require a considerable installation length, and cannot be high-modulated. Because the laser light can damage the eyes, special precautions must be taken during the assembly and operation. Ultimately, the Fourier-diaphragm must be centered very exactly, which means an additional expenditure of time.
  • this task is solved by choosing the optical path so that the detector is fed with light originating solely from the unlighted side of the testpiece.
  • the light fed to the detector does not contain light from any parts of the optical elements placed in the transmitter's path of rays.
  • the procedure has all the advantages of the procedure described in the aforementioned Portuguese Patent. This means that, during the measurement, one receives a continuous analog signal and can, therefore, continuously record the hairiness index. In addition, one receives a signal, which is independent of the draw-off speed of the yarn.
  • the invention also concerns a device to execute the mentioned procedure with a transmitter and a detector.
  • the device is characterized by the fact that the path of rays is laid out so that the detector only receives light from the side of the testpiece that is not illuminated by the transmitter and, therefore, only receives light from the illuminated edge of the testpiece surface.
  • FIG. 1 to 6 each shows a diagrammatic representation of a form of construction of a device according to the invention
  • FIG. 7 shows an actual arrangement according to the configuration of FIG. 5.
  • FIG. 1 to 6 each show a sensing or measuring arrangement with a light source or transmitter 1 and a condenser lens 2 or lens which produces a beam of substantially parallel light rays at the transmitting end, which light from the transmitter 1 is directed at a yarn 3, the hairiness of which is to be measured.
  • the scattered light from yarn 3 potted through a diaphragm 4 which defines the field to be measured, and hits an optical detector 5.
  • the light picked up by the detector 5 is, therefore, independent of the yarn diameter and the diffuse light reflected back from the illuminated surface of the yarn 3 cannot impinge upon the detector 5, so that this detector only sees the luminous edge of the yarn.
  • a continuous analog signal originates in the detector 5, so that the hairiness of the yarn 3 can be continuously recorded.
  • the intensity of this light is, as described in Portuguese Patent No. 75791, in proportion to the number of fibers standing up, and therefore, to the hairiness of the yarn.
  • the detector 5 "cannot see” any optical elements, such as lenses or mirrors situated in the optical path of the transmitter 1 (i.e., placed between the transmitter 1 and the yarn 3). Therefore, the scattered light from the dust particles lying on these elements cannot fall directly on the detector 5. These dust and dirt particles absorb part of the light from the transmitter 1 and thereby produce a certain minimal reduction of the light intensity impinging upon the detector 5. However, such minimal absorption by the dust and dirt particles does not produce an erroneous measurement.
  • an infrared light diode is preferably used with the light of the diode preferably being modulated. This is so that, in the detector path, the ambient light can be filtered out with, for example, a bandpass filter. Also, it is advantageous to shield the ambient light somewhat. It goes without saying that the transmitter 1 could also comprise a visible LED, a laser, or some other light source instead of the infrared light diode.
  • the receiver 5 may be a large surface photodiode, to receive the most scattered light possible, and to be as independent as possible from the shifting of the yarn image caused by changes in position or yarn vibrations.
  • the receiver 5 may also be a photo-multiplier, or a CCD-series cell (charge-coupled device), on which the yarn forms an image. In the latter case, one can measure the distribution of the hairiness in its distance from the edge of the yarn and thereby determine the diameter of the yarn 3.
  • a reference diode 6 may be provided at the transmitter 1 and at the detector 5 (not shown) to compensate for temperature drift.
  • FIG. 1 the simplest construction form is depicted, which does not use any lenses on the receiving side which, on the one hand means a certain cost reduction, however, on the other hand, leads to a relatively low light intensity on detector 5.
  • the diaphragm 4 which defines the field of the measurement i.e., a measuring field diaphragm
  • the reference diode 6 is situated between the condenser lens 2 and the measuring field diaphragm 4.
  • a measuring field diaphragm 4 is situated in image plane of the lens 7, a measuring field diaphragm 4 is situated.
  • the reference diode 6 is placed in an extension of the optical axis of the transmitter side in a special reference path, which, in addition, has a lens 8.
  • a dark background 9 on the transmitter side of yarn 3, towards which the detector 5 is directed.
  • overpressure containers 10, 11 and 12 i.e., which are supplied with air so as to have an outflow of air
  • dust and dirt Due to the chosen arrangement, by no means whatever can scattered light from the lenses 2 and/or 8 fall directly on the detector 5.
  • appropriate air curtains (not shown) can also be used.
  • the reference diode 6 serves to compensate for temperature and/or aging effects.
  • the optical yarn diameter can be determined.
  • FIG. 3 While in the forms of construction of FIGS. 1 and 2, the light impinges upon the yarn 3 at an angle of approximately between 45 degrees and 70 degrees, the form of construction of FIG. 3 shows a very flat impact angle of approximately 0 degree to 20 degrees. This is made possible by a mirror 13, which has a slit, through which the yarn 3 is led.
  • the ambient light is softened by a dark background 9 and by a detector casing 11, whereby the latter serves at the same time as an overpressure chamber to prevent the action of dust and dirt.
  • the measuring field diaphragm 4 is situated on the detector side near the yarn 3 and the reference diode 6 is situated on the transmitter side.
  • FIG. 4 a form of construction with a schlieren arrangement is depicted, which has an image-forming deflection mirror 14 placed on the detector side.
  • a second lens 15 is situated, after the condenser lens 2, and in its focal plane, there is a slit diaphragm 16 between these lenses.
  • the slit diaphragm 16 forms an image on the edge 17, which acts as a diaphragm, which means that it is on a conjugate plane to it.
  • FIGS. 5 and 6 each show a form of construction for a dark field optics arrangement with a central diaphragm 18 to block the direct light.
  • the light emitted from the transmitter 1 leaves the condenser lens 2 as a parallel beam of rays and the measuring field diaphragm 4 is placed between the condenser lens 2 and yarn 3.
  • the diaphragm 18, which absorbs the direct light rays, is placed directly in front of the receiver lens 7.
  • FIG. 6 shows a modification of this form of construction, in which a slit diaphragm 16 is placed between the transmitter 1 and condenser lens 2, and the central diaphragm 18 is placed in a conjugate plane to slit diaphragm 16, so that, through the condenser lens 2, the slit diaphragm 16 forms an image on the central diaphragm 18.
  • the central diaphragm 18 is thereby situated directly in front of the receiver lens 7, Since, with this arrangement, the beam of rays from the condenser lens 2 and the receiver lens 7 does not run in a parallel manner, the signal of detector 5 is sensitive to the distance from yarn 3 to the receiver lens 7.
  • the device described also contains, of course, mechanical components to insert and remove the yarn to be tested. Since, in principle, these mechanical components are the same as in the measuring instruments for hairiness available commercially today, which, by the way for the most part are based on a method of counting the fibers standing up from the yarn, it is also not described here. In this connection, reference is made to the brochure mentioned previously "Yarn Hairiness”.
  • FIG. 7 shows the design construction of a measuring arrangement of the type schematically represented in FIG. 5, in a scale of approximately 1:1.
  • the measuring device consists of two subassemblies, a transmitter component S and a detector component E, which are assembled on a base plate 19.
  • the transmitter component S contains a condenser lens 2, which combines the light from the light emitting diode into a parallel beam of rays, as well as the measuring field diaphragm 4.
  • the detector component E contains the center 7 with the central diaphragm 18 and the detector 5. Between the center 7 and the detector 5, a glass holder 20 is placed with an absorber diaphragm 21.
  • the depicted measuring device will be installed in an instrument, which, among other things, will have guiding and transport means for the yarn; see, for example, the Swiss Patent Application No. 02 823/86-2, the entire disclosure of which is incorporated herein by reference.
  • a tension device is placed in front of the measuring organ, in the upper part of the figure.
  • two thread guides are provided, and below the measuring device, two drawing-off rollers are provided for the yarn 3.
  • the drawing-off speed may be up to several meters per second.
  • the transmitter 1 is modulated.
  • the photoelectric current generated in the detector 5 is converted into a proportional voltage and this signal is amplified, rectified, filtered through a low-pass filter and then evaluated by a computer.
  • the voltage averaged over time is a measure for the average hairiness index.
  • short-term fluctuations of the hairiness or periods of hairiness can also be measured by applying the Fourier-transformation.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
US07/320,828 1985-12-17 1989-02-07 Method and apparatus for examining hairiness of yarn Expired - Lifetime US4948260A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH05370/85 1985-12-17
CH5370/85A CH668483A5 (de) 1985-12-17 1985-12-17 Verfahren und vorrichtung zur bestimmung der oberflaechenstruktur eines langgestreckten pruefkoerpers, insbesondere zur messung der haarigkeit eines garnes.

Related Parent Applications (1)

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US06939692 Continuation 1986-12-09

Publications (1)

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US4948260A true US4948260A (en) 1990-08-14

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US07/320,828 Expired - Lifetime US4948260A (en) 1985-12-17 1989-02-07 Method and apparatus for examining hairiness of yarn

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US (1) US4948260A (fr)
EP (1) EP0226843B1 (fr)
JP (1) JPH0692941B2 (fr)
CH (1) CH668483A5 (fr)
DE (1) DE3688367D1 (fr)
ES (1) ES2039348T3 (fr)
IN (1) IN168641B (fr)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5043590A (en) * 1989-10-30 1991-08-27 Strandberg Jr Charles F Method and apparatus for monitoring size encapsulation of yarn on a slasher
US5072691A (en) * 1989-10-30 1991-12-17 Strandberg Jr Charles F Apparatus for monitoring size encapsulation of yarn on a slasher
US5149981A (en) * 1989-10-30 1992-09-22 Strandberg Jr Charles F Method for monitoring size encapsulation of yarn by determining hairiness of the yarn
US5160850A (en) * 1991-01-14 1992-11-03 Walter J. Spirig Light beam interrupt detection apparatus for use in a vibrating environment
US5305073A (en) * 1992-02-12 1994-04-19 Precision Detectors, Inc. Methods and apparatus for molecular characterization
US5414520A (en) * 1992-03-17 1995-05-09 Zellweger Uster Ag Process and device for detecting impurities in a textile test material
US5615014A (en) * 1995-07-20 1997-03-25 Keisokki Kogyo Co., Ltd. Yarn measuring device
US5701176A (en) * 1995-07-28 1997-12-23 Precision Detectors, Inc. High temperature light scattering measurement device comprising a rigid extension tube
US6202493B1 (en) 1994-04-27 2001-03-20 Commonwealth Scientific And Industrial Research Organisation Methods and apparatus for determining a first parameter(s) of an object
WO2006002893A1 (fr) * 2004-06-29 2006-01-12 Iro Ab Ensemble capteur de fil optoelectronique
US20060098200A1 (en) * 2004-11-06 2006-05-11 Saurer Gmbh & Co. Kg Yarn sensor
US20060278831A1 (en) * 2005-06-14 2006-12-14 Mitsubishi Denki Kabushiki Kaisha Infrared inspection apparatus, infrared inspecting method and manufacturing method of semiconductor wafer
US20080151261A1 (en) * 2006-12-20 2008-06-26 Jon Jacob Kaminer Process and apparatus for online detection of surface irregularity in threadlines
EP1621872A3 (fr) * 2003-01-08 2009-03-25 Premier Evolvics PVT. Ltd. Mesurer et tester matériau textil continu et étendu
WO2011153648A1 (fr) 2010-06-09 2011-12-15 Uster Technologies Ag Dispositif de détermination optoélectronique de caractéristiques d'un fil
WO2011153650A1 (fr) 2010-06-09 2011-12-15 Uster Technologies Ag Procédé et dispositif de détermination optoélectronique de la répartition des longueurs de poils d'un fil
US20110303848A1 (en) * 2007-08-13 2011-12-15 Ndc Infrared Engineering Limited Method and Apparatus for Electromagnetic Detection for Use in the Manufacture of Fibrous Web
CN104237253A (zh) * 2013-06-14 2014-12-24 村田机械株式会社 丝条状态检测方法以及丝条状态检测装置
US20150022813A1 (en) * 2013-07-16 2015-01-22 Rieter Cz S.R.O. CMOS Optical Detector Comprising Plurality of Optical Elements for Device for Monitoring Parameters of Moving Yarn on Textile Machines
CN104328642A (zh) * 2014-10-24 2015-02-04 武汉纺织大学 一种定向伸展式精确测试纱线毛羽的装置
CN104458742A (zh) * 2014-10-24 2015-03-25 武汉纺织大学 一种定向伸展式精确测试纱线毛羽的方法
US11242215B2 (en) 2019-03-07 2022-02-08 Corning Incorporated Apparatus and methods for detecting stray optical fibers during winding
US20230234806A1 (en) * 2022-01-24 2023-07-27 Cvd Equipment Corporation Fiber handling system with fuzz detection
EP4603827A1 (fr) * 2024-02-19 2025-08-20 Gebrüder Loepfe AG Dispositif et procédé de détection de qualité de fil

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
JP3189378B2 (ja) * 1992-04-15 2001-07-16 住友電気工業株式会社 光ファイバ樹脂被覆内気泡検出装置及び光ファイバ樹脂被覆内気泡検出方法
ES2183984T3 (es) * 1995-11-30 2003-04-01 Thermo Labsystems Oy Nefelometro.
JP2006184177A (ja) * 2004-12-28 2006-07-13 Mitsubishi Electric Corp 赤外検査装置及び赤外検査方法
DE102008037258B4 (de) * 2008-08-09 2024-09-19 Saurer Intelligent Technology AG Vorrichtung zum optischen Abtasten eines längs bewegten Faserstranges
CH701772A1 (de) * 2009-09-07 2011-03-15 Uster Technologies Ag Vorrichtung und Verfahren zur optischen Abtastung eines bewegten Textilmaterials.

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US2641960A (en) * 1947-05-14 1953-06-16 Deering Milliken Res Trust Indicating and recording device for yarn diameters
US2699701A (en) * 1950-08-01 1955-01-18 Deering Milliken Res Trust Yarn diameter measuring and recording instrument
US2991685A (en) * 1956-10-24 1961-07-11 American Enka Corp Apparatus for testing bulked yarn
US3563660A (en) * 1967-03-02 1971-02-16 Fisher Scientific Co Method and apparatus for determining particle size and shape
US3709610A (en) * 1970-05-20 1973-01-09 Holobeam Method and apparatus for measuring and controlling the thickness of a filament or the like
US3712743A (en) * 1971-01-05 1973-01-23 Eastman Kodak Co Apparatus for detecting and measuring yarn defects and irregularities
US3719425A (en) * 1969-05-20 1973-03-06 Leitz Ernst Gmbh Apparatus for measuring the dimension of an object
US3804529A (en) * 1973-01-24 1974-04-16 Gen Electric Detection by laser diffraction of filament coils wound on a mandrel
DE2637195A1 (de) * 1976-08-18 1978-02-23 Jaeger Emil Kg Verfahren zur messung sehr kleiner gegenstaende
PT75791A (en) * 1982-11-03 1982-12-01 Inst Universitario Da Beira In Method and device for measuring hairiness of textile yarns
GB2123550A (en) * 1982-05-17 1984-02-01 Beta Instr Co Contamination prevention in optical measuring apparatus

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JPS5310186B2 (fr) * 1973-07-18 1978-04-12
JPS5156690A (ja) * 1974-11-13 1976-05-18 Todai Denki Seisakusho Kk Kebakenshutsusochi
DE3144379C2 (de) * 1981-11-07 1987-01-02 Carl Schenck Ag, 6100 Darmstadt Verfahren zur Durchführung von Rißuntersuchungen und Prüfkörper zur Durchführung des Verfahrens
JPS58214577A (ja) * 1982-06-07 1983-12-13 東レ株式会社 走行糸条の毛羽検出方法
JPS5968653A (ja) * 1982-10-13 1984-04-18 Furukawa Electric Co Ltd:The 物体の表面検査方法

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641960A (en) * 1947-05-14 1953-06-16 Deering Milliken Res Trust Indicating and recording device for yarn diameters
US2699701A (en) * 1950-08-01 1955-01-18 Deering Milliken Res Trust Yarn diameter measuring and recording instrument
US2991685A (en) * 1956-10-24 1961-07-11 American Enka Corp Apparatus for testing bulked yarn
US3563660A (en) * 1967-03-02 1971-02-16 Fisher Scientific Co Method and apparatus for determining particle size and shape
US3719425A (en) * 1969-05-20 1973-03-06 Leitz Ernst Gmbh Apparatus for measuring the dimension of an object
US3709610A (en) * 1970-05-20 1973-01-09 Holobeam Method and apparatus for measuring and controlling the thickness of a filament or the like
US3712743A (en) * 1971-01-05 1973-01-23 Eastman Kodak Co Apparatus for detecting and measuring yarn defects and irregularities
US3804529A (en) * 1973-01-24 1974-04-16 Gen Electric Detection by laser diffraction of filament coils wound on a mandrel
DE2637195A1 (de) * 1976-08-18 1978-02-23 Jaeger Emil Kg Verfahren zur messung sehr kleiner gegenstaende
GB2123550A (en) * 1982-05-17 1984-02-01 Beta Instr Co Contamination prevention in optical measuring apparatus
PT75791A (en) * 1982-11-03 1982-12-01 Inst Universitario Da Beira In Method and device for measuring hairiness of textile yarns

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5072691A (en) * 1989-10-30 1991-12-17 Strandberg Jr Charles F Apparatus for monitoring size encapsulation of yarn on a slasher
US5149981A (en) * 1989-10-30 1992-09-22 Strandberg Jr Charles F Method for monitoring size encapsulation of yarn by determining hairiness of the yarn
US5043590A (en) * 1989-10-30 1991-08-27 Strandberg Jr Charles F Method and apparatus for monitoring size encapsulation of yarn on a slasher
US5160850A (en) * 1991-01-14 1992-11-03 Walter J. Spirig Light beam interrupt detection apparatus for use in a vibrating environment
US5305073A (en) * 1992-02-12 1994-04-19 Precision Detectors, Inc. Methods and apparatus for molecular characterization
US5414520A (en) * 1992-03-17 1995-05-09 Zellweger Uster Ag Process and device for detecting impurities in a textile test material
US6202493B1 (en) 1994-04-27 2001-03-20 Commonwealth Scientific And Industrial Research Organisation Methods and apparatus for determining a first parameter(s) of an object
US5615014A (en) * 1995-07-20 1997-03-25 Keisokki Kogyo Co., Ltd. Yarn measuring device
US5701176A (en) * 1995-07-28 1997-12-23 Precision Detectors, Inc. High temperature light scattering measurement device comprising a rigid extension tube
EP1621872A3 (fr) * 2003-01-08 2009-03-25 Premier Evolvics PVT. Ltd. Mesurer et tester matériau textil continu et étendu
CN101027237B (zh) * 2004-06-29 2011-04-13 Iro有限公司 光电纱线传感器装置
WO2006002893A1 (fr) * 2004-06-29 2006-01-12 Iro Ab Ensemble capteur de fil optoelectronique
US7324201B2 (en) * 2004-11-06 2008-01-29 Oerlikon Textile Gmbh & Co. Kg Yarn sensor
US20060098200A1 (en) * 2004-11-06 2006-05-11 Saurer Gmbh & Co. Kg Yarn sensor
US20060278831A1 (en) * 2005-06-14 2006-12-14 Mitsubishi Denki Kabushiki Kaisha Infrared inspection apparatus, infrared inspecting method and manufacturing method of semiconductor wafer
US20080151261A1 (en) * 2006-12-20 2008-06-26 Jon Jacob Kaminer Process and apparatus for online detection of surface irregularity in threadlines
WO2008082498A1 (fr) * 2006-12-20 2008-07-10 E. I. Du Pont De Nemours And Company Procédé et appareil pour la détection en ligne d'irrégularités de surface dans un parcours de fil
US20110303848A1 (en) * 2007-08-13 2011-12-15 Ndc Infrared Engineering Limited Method and Apparatus for Electromagnetic Detection for Use in the Manufacture of Fibrous Web
US9024259B2 (en) * 2007-08-13 2015-05-05 Ndc Infrared Engineering Limited Method and apparatus for electromagnetic detection for use in the manufacture of fibrous web
WO2011153648A1 (fr) 2010-06-09 2011-12-15 Uster Technologies Ag Dispositif de détermination optoélectronique de caractéristiques d'un fil
WO2011153650A1 (fr) 2010-06-09 2011-12-15 Uster Technologies Ag Procédé et dispositif de détermination optoélectronique de la répartition des longueurs de poils d'un fil
JP2015001433A (ja) * 2013-06-14 2015-01-05 村田機械株式会社 糸条状態検出方法及び糸条状態検出装置
CN104237253A (zh) * 2013-06-14 2014-12-24 村田机械株式会社 丝条状态检测方法以及丝条状态检测装置
US20150022813A1 (en) * 2013-07-16 2015-01-22 Rieter Cz S.R.O. CMOS Optical Detector Comprising Plurality of Optical Elements for Device for Monitoring Parameters of Moving Yarn on Textile Machines
US9347889B2 (en) * 2013-07-16 2016-05-24 Rieter Cz S.R.O. CMOS optical detector with a plurality of optical elements for device for monitoring parameters of a moving yarn on textile machines
CN104328642A (zh) * 2014-10-24 2015-02-04 武汉纺织大学 一种定向伸展式精确测试纱线毛羽的装置
CN104458742A (zh) * 2014-10-24 2015-03-25 武汉纺织大学 一种定向伸展式精确测试纱线毛羽的方法
CN104458742B (zh) * 2014-10-24 2017-02-15 武汉纺织大学 一种定向伸展式精确测试纱线毛羽的方法
US11242215B2 (en) 2019-03-07 2022-02-08 Corning Incorporated Apparatus and methods for detecting stray optical fibers during winding
US20230234806A1 (en) * 2022-01-24 2023-07-27 Cvd Equipment Corporation Fiber handling system with fuzz detection
EP4603827A1 (fr) * 2024-02-19 2025-08-20 Gebrüder Loepfe AG Dispositif et procédé de détection de qualité de fil
EP4603826A1 (fr) * 2024-02-19 2025-08-20 Gebrüder Loepfe AG Dispositif et procédé de détection de qualité de fil

Also Published As

Publication number Publication date
EP0226843A3 (en) 1990-03-07
IN168641B (fr) 1991-05-11
JPH0692941B2 (ja) 1994-11-16
JPS62147348A (ja) 1987-07-01
CH668483A5 (de) 1988-12-30
ES2039348T3 (es) 1993-10-01
EP0226843B1 (fr) 1993-04-28
EP0226843A2 (fr) 1987-07-01
DE3688367D1 (de) 1993-06-03

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